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Volvo S90 XC90 XC60 T6/T5 Vibration Issue SPA 2018

34K views 35 replies 16 participants last post by  Grenz1281 
#1 · (Edited)
(Solved) Volvo S90 XC90 XC60 T6/T5 Vibration Issue SPA 2018 (AWD)

Hello everyone,

I had a noticeable vibration on my 2018 S90 T6 Inscription. The car was shuttering and vibrating heavily under acceleration or coasting at different speed (at 30K miles).

After inspecting and balancing the tires and wheels twice, as advised by the dealer, as usual:mad:. It turned out the axle shaft in the front right was the cause of the vibration. Easy to inspect by any qualified technician. The right side was moving while the other side wasn't. Check the below video and you will see the play in the axle.

The car was making the vibration since 24k miles and it was intermittent. I found the source of the vibration at around 30K miles, after it got worse & became permanent.

Update 1 ::mad::mad::mad:

The dealer diagnosed the car and found two issues:
1- The right drive axle had a play and needed to be replaced as expected

2- Front Prob drive shaft CV Joint is defective: The dealer showed me the new redesigned version where it is marked with a green line. If you don't see the green line on your prob shaft, this means you might have the old design one and will probably be defective.

Item#2 in the picture CV JOINT
propeller shaft.
Only for front CV joints. For rear CV joints the entire propeller shaft must be replaced. front.



Update 2 :whistle::whistle::thumbup::thumbup::thumbup:

Guys,

If you are facing this weird vibration, it's coming from the drive shaft (Propeller shaft front head) on AWD system. Check the last page in this technical journal. https://static.nhtsa.gov/odi/tsbs/2019/MC-10158649-9999.pdf

If your car doesn't have the green mark on the propeller shaft, it has to be replaced right away as it's most likely defective. The dealer replaced this part under warranty and the vibration in the cabin and drivetrain went away. However, I still have other vibration issues from two bent wheels and tire bubbles (20'' wheels sucks :mad::thumbdown:). Car mileage around 32K miles.

There is a rebuild kit #31492442 if your car out of warranty

https://usparts.volvocars.com/p/Volvo_2018_S90-20l-4-cylinder-Turbo/Cv-joint/71860600/31492442.html
 
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1
#2 ·
What was your vibration like? I.e., above 65mph, shook the steering wheel, shook the whole car?

The reason I ask is because I have a 2019 S60 T6 that starts shaking above 65. It only has 1500 miles and has done this since new. The dealer has replaced the tires 3 times; road force balanced every time, and replaced my 19” rims last week. They also did an alignment when they replaced the rims.

Here’s where I’m confused- when I picked the car up after the new rims and alignment, the car drive smoothly above 65 for the first time, but within a day I’m already feeling shaking again. This shaking causes the steering wheel to shake side to side and my passenger seat will start shaking above 72.

I’d be curious to see if you had similar symptoms. After 7 trips to the dealer for this issue, I think I’m on my own to figure this out.

Thanks,
Dennis


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#4 · (Edited)
What was your vibration like? I.e., above 65mph, shook the steering wheel, shook the whole car?

The reason I ask is because I have a 2019 S60 T6 that starts shaking above 65. It only has 1500 miles and has done this since new. The dealer has replaced the tires 3 times; road force balanced every time, and replaced my 19" rims last week. They also did an alignment when they replaced the rims.

Here's where I'm confused- when I picked the car up after the new rims and alignment, the car drive smoothly above 65 for the first time, but within a day I'm already feeling shaking again. This shaking causes the steering wheel to shake side to side and my passenger seat will start shaking above 72.

I'd be curious to see if you had similar symptoms. After 7 trips to the dealer for this issue, I think I'm on my own to figure this out.

Thanks,
Dennis

Sent from my iPhone using Tapatalk
My vibration was a multi-source one.

Source one: bent wheel and wheel out of balance. I fixed the bent wheels and balanced the wheels multiple times with no luck. Last thing I did is to balance the wheels with the Hunter GSP9700. This machined balanced my tires very well. I noticed the car has zero vibrations on the steering wheel and the feeling is firm. This what lead me to discover the source #2 of the vibration as my tires/wheels vibration is solved.

Source two: play on the axle and vibration was appearing sometimes, before it became worse, after a speed of 40 miles and above. This vibration is noticeable even on the car seats. It feels like something is not tight in the drivetrain. This is where I discovered the loose axle bolt and the bad axle. When I was tightening that bolt, it was pretty loose. Without any force and the torque wrench was moving with no force (suggested torque was 25 ft/lb). I suspect the factory forgot to tight the bolt and it damaged the axle after this mileage.

It's Easy to check if you remove the wheel cap. Becareful do not tight that bolt if the car was hot. Also just check with a 13mm socket if it was lose or not. No more than 20 degree turn of tight. Let the dealer tight it if it was loose. Maybe the factory forgot to tight that critical bolt.
 
#3 ·
Add me to the vibration crew.

Within days of picking our car up in May, with 2 miles on the odometer, it began having a faint vibration coming through the butt of the seat, indicating something in the rear. This vibration will start around 50mph and is present from there on. It does not manifest itself as a vibration in the steering wheel.

I finally took the car in a couple of weeks ago because it is a bit of a nuisance. The tech and the shop foreman took the car out and said they couldn't replicate it. The service manager asked that I come in with the car on a day that the foreman is available to ride with me so I can demonstrate the issue. He also suggested that it could be a slightly unbalanced drive shaft. I hope it's not that, and also think that's a big jump from the more obvious potential problem around the Pirellis with the noise cancellation foam in them.
 
#5 ·
Check the tire pressure (39psi for 20" wheels) and inspect for flat spots. Flat spots can disappear after diriving the car for more than 500 miles (long commuting). Hopefully, this is the source of your vibration and it's not that axle bolt!!!
 
#6 ·
Update::D:D:D

The dealer diagnosed the car and found two issues:
1- The right drive axle had a play and needed to be replaced as expected

2- Front Prob drive shaft CV Joint is defective: The dealer showed me the new redesigned version where it is marked with a green line. If you don't see the green line on your prob shaft, this means you might have the old design one and will probably be defective.

Item#2 in the picture CV JOINT
propeller shaft.
Only for front CV joints. For rear CV joints the entire propeller shaft must be replaced. front.

 
#7 ·
I'm driving a 2016 XC90 T6 Momentum Plus.

The vibration started around 37k miles with my Nokian WRG4 tires. It was horrible for a few days, took it to the tire shop who rebalanced. Drove ok for a day and then came back. They rebalanced again and came back a few days later. Volvo then took it in and blamed it on road force with a reading of 140 pounds of road force. From what I understand, 140 is virtually impossible.

The tire shop took it back this past week for three days, swapped the originals, put the Nokians back and got the excessive shaking and thumping to go away. All they did was rebalance, again. Everything seemed great, but a few days later it is back, but just not as extreme. The thumping is all over the place. Sometimes it feels like it's under my left driver side, then other times on the right and sometimes the wheel vibrates (not lane assist vibration). It happens intermittently and now sometimes when I back-up with the wheel turned all the way, the wheel vibrates like crazy.

I am losing my mind now because I cannot reproduce this every time I get in the car to show a tech and I am just being sent back and forth between the dealer and the tire shop. Spending 1-2 hours per day in the car is officially driving me insane and I feel like I'm going crazy.

#help
 
#9 ·
I'm driving a 2016 XC90 T6 Momentum Plus.

The vibration started around 37k miles with my Nokian WRG4 tires. It was horrible for a few days, took it to the tire shop who rebalanced. Drove ok for a day and then came back. They rebalanced again and came back a few days later. Volvo then took it in and blamed it on road force with a reading of 140 pounds of road force. From what I understand, 140 is virtually impossible.

The tire shop took it back this past week for three days, swapped the originals, put the Nokians back and got the excessive shaking and thumping to go away. All they did was rebalance, again. Everything seemed great, but a few days later it is back, but just not as extreme. The thumping is all over the place. Sometimes it feels like it's under my left driver side, then other times on the right and sometimes the wheel vibrates (not lane assist vibration). It happens intermittently and now sometimes when I back-up with the wheel turned all the way, the wheel vibrates like crazy.

I am losing my mind now because I cannot reproduce this every time I get in the car to show a tech and I am just being sent back and forth between the dealer and the tire shop. Spending 1-2 hours per day in the car is officially driving me insane and I feel like I'm going crazy.

#help
I'm having a very similar issue, but with a brand new 2019 S60 T6. The shaking has been there since day 1- it's worst on the freeway between 68 - 72 mph, but I'm also getting the shaking when I'm backing out of a spot with the wheel turned all the way.

The dealer has replaced my tires 3x and rims once- after the rim replacement the shaking was gone for a few days, but now it's back. The steering wheel seems to shimmy side to side and my passenger seat will shake while I'm on the freeway.

I really can't understand the shaking at low speed with the wheel turned- it makes me think maybe it is something with the LKA system or whatever is responsible for the haptic feedback you feel in the wheel when crossing a lane marker...?

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#11 ·
Guys,

If you are facing this weird vibration, it's coming from the drive shaft (Propeller shaft front head). Check the last page in this technical journal. https://static.nhtsa.gov/odi/tsbs/2019/MC-10158649-9999.pdf

If your car doesn't have the green mark on the propeller shaft, it has to be replaced right away as it's most likely defective. The dealer replaced this part on my care and the vibration in the cabin and drivetrain went away. However, I still have other vibration from two bent wheels and one tire has bubble. car mileage around 32K miles
 
#12 ·
And to clarify your post regarding the propeller shaft, it appears to apply only to AWD vehicles.
 
#13 ·
Thanks for this! I’m going to climb under there today and see if my front prop shaft has the green mark. It’s easily visible with the car jacked?

I’ve been losing my mind with this shaking and the dealer really doesn’t seem to be interested in troubleshooting my car at this point, so it’s nice to have something to go on.

The shaking seems to be resolved with the smaller rims and snow tires, but does get shaky above 80mph- I’m thinking that has more to do with the winter tires right?


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#14 ·
Add mine to the list. I am new to the forum, I just purchased a lightly used 2018 S90 AWD with 15k back in late October. I thought the issue at first was with the tires. I took it to a trusted place and had road force balancing done. The vibration was still there highest number was 11. I then took it to the dealer, they did not road test, but told me the front rotors were out of round. So I replaced the front rotors on my dime and on my way home it still vibrated. I have a mild to medium vibration mainly on the highway. Sometimes it happens at lower speeds, but it happens every time I am on the highway. It is in my seats, steering wheel, floor, etc. I then ordered 4 new Michelin Tour A/S tires and had them mounted and road force balanced. The car is smoother from a tire perspective, but it actually makes the vibration more noticeable. I am going to make another appointment at the dealer and point out this TJ. I am a little miffed that they didn't even road test it to see what was going on. Bummed that I just got the car and I am dealing with this problem, kind of takes the fun out of a new car. However that is what warranty's are for. I just hope I don't have to put anymore out of pocket money into this problem. So far I have almost two grand in under two months with the tires, rotors, and balancing. :facepalm:
 
#15 ·
I took my S90 in this morning. I explained the trail of things that I have done road force balancing, new tires, rotors etc.. I mentioned the Tech Journal. My service rep asked the shop foreman to take a ride with me. I got onto the highway and pointed out the mild to moderate vibration and he said it was normal. I continued to drive and my phone was mildly vibrating in the center console. I also felt the vibration in the steering wheel, floor, and seat. He said it was normal. He then asked what my Road Force numbers were and I said 9 3 3 and 21. He immediately said my issue was due to the 21 on my right rear wheel. I said why I agree that the number is on the higher side Volvo noted anything below 23 is acceptable. Tire shops feel anything below 27 is acceptable. So I have them attempting to road force balance my wheels again. I may reach out to Tire Rack to see if they will replace the higher numbered tire. The issue was occurring before I got these tires and has continued since I got the tires which makes me feel like it is drive train related. Not sure how to proceed. I drove my car all weekend below 60 and the issue did not present itself. As soon as I get on the highway above 70 the issue starts and continues. If this was a part of the design and nothing could be done I would live with it. However I hear of people who do not have a vibration issue or had the issue resolved so I may need to get Volvo involved if the issue persists.
 
#16 ·
Alright friends here is an update of what is going on. I have replaced the highest number new tires on my car. Tirerack was great about sending a replacement. My numbers are all below 11 now. My vibration issue persists. I sent out an email this morning to CEM@volvocars.com. Not sure if I should contact someone in the US.

I got an auto reply from Customer Experience Operations stating they would look into the issue.
T +46-31-325 00 77
cxo@volvocars.com<mailto:cxo@volvocars.com>
VOLVO CAR CORPORATION
63780
Assar Gabrielssons Vag , SE-405 31 Göteborg, Sweden

Here is what I sent:
I am reaching out to you in hopes that you can assist me. I have a 2018 Volvo S90 T5 Momentum. I have been having an issue with a mild to moderate vibration that is felt through my entire car (Floor, Seats, Steering wheel) while on the highway mainly above 70mph. I took my vehicle to a trusted tire specialist and had my wheels road force balanced. Everything checked out and the highest number was 14 for road force.. I went on the highway and the issue was still present. I took it to BR Volvo and they did not road test the car, they simply replaced the front rotors and said that was likely the problem. (Issue was never present when braking.) I left the dealer and got on the highway and the vibration persisted. I drove the car for 1 thousand miles this way and decided I would replace all 4 tires. I replaced the tires with 4 new Michelin Primacy Tour A/S. Tires were mounted and balanced. 1 tire had a road force number of 21. All other tires were much lower. The vibration issue persisted on the highway. I made another appointment with BR Volvo and the shop foreman went for a ride with me. I mentioned that there is a tech journal about this issue and asked if they would follow the steps listed. He felt the vibration and stated that it was normal for SPA platform cars to vibrate on the highway. He asked if I had the tires road force balanced and what my numbers were I gave him the numbers and he said the tire at 21 was to blame for the vibration. He also said that he had no way of knowing if the equipment had been calibrated properly at the tire shop I went to or if there employees were correctly trained on the equipment so he said his guys could attempt another road force balance at my cost. I agreed. I was called and told my car was done. I went to pick it up and my service adviser sent me over to the cashier with no information on road force numbers or what the next steps would be. I had to ask for the information and the numbers were much higher than the first time I had the tires road force balanced. Now my highest numbers were 28 and 16. The Volvo tech recommended replacing the back two tires. When I left and entered the highway the issue was way worse. The steering wheel shimmied and there was a more noticeable vibration.The next morning I checked the tire pressure and the tires were at 42 PSI and not at 36 PSI which is listed in the door for my 19 inch wheels. I corrected tire pressure and road tested my car. Vibration was still present. I contacted tire rack and got replacement tires and had them shipped to my trusted installer. I explained what is going on to my installer and they mounted the new tires and road force balanced all 4 wheels again. This time we are at 11, 8, 6, 4. He also noted that the dealer had mounted additional weights to my wheels and they were off balance on 3 of the 4 wheels. He corrected that. He also verified that his hunter road force equipment is calibrated once a week. I payed again and left entered the highway and the shimmy was gone, however the original vibration persisted. So at this point I have been through 4 road force balancing 2 sets of tires and replacement tires. I am uncertain where to go from here. I know I am not the only person experiencing this issue. I would like to take my car to another Volvo dealer (Star Volvo Greensburg, Pa). I would really like my drive line checked and the steps in the tech journal performed past the road force balancing. I do not want to have that done again. I know there is an updated damper that could cure my issue. I am hoping you can guide me in the right direction and possibly assist with communicating with the dealer to see if we can get this resolved. I recently extended my warranty with VIP coverage with hopes of keeping my car for a while. I really enjoy it around town however my daily highway commute becomes tiring and frustrating with the vibration. I have had two other Volvo's in the past and was thrilled to get my S90. If I can just get past this issue I am hopeful that the rest of my experience will be what I have come to expect from Volvo!

Have a great day!

Josh
 
#19 ·
For those who suffers from vibration issue, the quickest and easiest way of determining without wasting your life away at the dealership is by downloading one of the vibration frequency detection app onto your phone. If it follows the rpm of the wheels, then it is either your tires, wheels, or brake, if it is approx. 2.5x the speed of the wheel, then it is the prop shaft connecting the front drivetrain to the rear.
 
#31 ·
Check my last thread, I found the issue finally...

https://forums.swedespeed.com/showthread.php?615071-(Discovered)-Volvo-S90-XC90-XC60-T6-T5-AWD-Vibration-Issue-SPA-(AWD)-Propeller-Shaf

Sounds like I have the same type of issue but it seems to have good days and bad bays, intermittent. Really felt the vibration after a long drive. I have 60K on my 2018 XC90 and glad I have the VIP coverage. It looks like these repairs wil be covered, I hope.
Thanks for your post, this has been driving me up the wall!
 
#21 ·
Hi from Italy! Same problem of the vibration all car, not only sterring. But on my car, the vibration starts at low speed, 35km/h. I've tried to drive one week without the awd drive shaft, but vibrations are still there. Balanced wheels, tried to tight the central screw of left side shaft. All seems to be ok. I supposed some engine rubber damaged, but I still tried to turn off the car at low speed to try this. Nothing :cry:. When I start notice this, at the same time I noticed the sterring wheel , when at the end in parking movement, especially in reverse, it make a strange end vibration. Could it be connected at the driving vibration? Rims has been balanced, as well as the tires (the first thing I tested). It's really a nightmare...
(Sorry for my not perfect english, but I wanted to try to share the problem with you)
 
#22 ·
Hi from Italy! Same problem of the vibration all car, not only sterring. But on my car, the vibration starts at low speed, 35km/h. I've tried to drive one week without the awd drive shaft, but vibrations are still there. Balanced wheels, tried to tight the central screw of left side shaft. All seems to be ok. I supposed some engine rubber damaged, but I still tried to turn off the car at low speed to try this. Nothing :cry:. When I start notice this, at the same time I noticed the sterring wheel , when at the end in parking movement, especially in reverse, it make a strange end vibration. Could it be connected at the driving vibration? Rims has been balanced, as well as the tires (the first thing I tested). It's really a nightmare...
(Sorry for my not perfect english, but I wanted to try to share the problem with you)
Hi,

what's your car engine and mileage?

Where do you feel the vibration is coming from (rear/front/right/left)?

Sent from my YAL-L21 using Tapatalk
 
#25 ·
If not a bent wheel, tires, or alignment issue, my guess it's 99% CV axle related. To verify this, just when cruising at 65-75 MPH, push the gas pedal gently back and forth and see if you feel that vibration.

I'm talking from my experience with my S90, it turned out I had under torqued front axle bolts + defective CV axle that was causing the vibration issue because of slight play. The play couldn't be discovered until the CV axle was removed from the car, and inspected by expert. This is why when the dealer checked for play, they couldn't find anything wrong.

I'm currently in the process of rebuilding/replacing the CV axles and will share my whole experience accordingly within weeks.

Honestly, I'm really not sure how these CV axles failed this early. I doubt Volvo is supplying their CV axles from a low quality supplier. FYI, chineese CV axles are known to cause vibration from day 1.

My video of CV Axle excessive play:



Useful information video:


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#26 ·
The dealerships are well-versed as to what S90 parts can break due to poor (Chinese) “craftsmanship”. Volvo Culver City didn’t raise any eyebrow where they fixed $5k worth of warranty issues on my MY2018 CPO S90 (including loose driver seat, replaced fuel injectors, distorted passenger door speaker).
 
#28 ·
Finally I found the root cause of the vibration issue. I replaced the current CV axle with a used CV axle (donor: 2017 S90 30k miles) and yes the vibration disappeared completely from the passenger side (70% of the total vibration is gone). Unfortunately, I will still need to replace the driver side as well as there's also a slight play in inner CV axle joint.

To help everyone, unfortunately, you can't find that play unless you remove the CV axle and check. When it's installed on the car, you might find nothing.

In a nutshell, the cause of the vibration was because of a very slight play in the inner CV Tripod Joint. The factory CV axle for my 2018 Volvo S90 is MADE IN CHINA. Not to comprise the quality of Chinese products but unfortunately, the quality is bad and garbage. Period. So, if your car vin start with LVY, the chance you will have a Chinese made CV axle is 99%.

Anyway, the used CV axke that I installed is definitely Made in Europe as the donor car was a 2017 Made in Sweden. Unfortunately, I didn't discover where the marking is until I installed the CV axle and checked the garbage CV axle. However, the carrier bearing mount was Made in Turkey (31437177). So, it's definitely made in europe.

For the garbage CV axle, the carrier bearing has a different part number (31437750). You can see this part number near the carrier bearing lower bolt once you remove the tire. For the European carrier bearing, it's on the rubber of the bearing instead.

My next step is to find the needed parts to rebuild the garbage CV axle. Mostly, all waht I will need is a high quality Tripod joint made in Europe. That should solve it. I will share that separately later on.

Good luck everyone.

Here are the pictures of the Chinese CV axle:





The used CV axle installed (the bad looking one) hhhh:



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#29 ·
I guess we'll never know but wondering if replacing it with another Chinese made CV axel would've accomplished the same results. Nonetheless, thank you for sharing all the details and pictures!

...and shame on Volvo for not being capable of fixing your issue! you should share this experience with Volvo Corporate.
 
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#30 ·
That would have seemed like one of the first things they would have checked - CV axles.:rolleyes:
 
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#32 ·
Again, more details....

If it's not your tires (foam), wheels, brakes, balance; it's from the garbage low quality axles Volvo used in their SPA cars (the one made in China mainly). Is yours vin starts with "LVY"?

For your info all, the inner tripod joint is the cause of such vibration. Slight play on any of the three wheels below is enough to shake the whole car under braking or acceleration or cruising. Imagine 2 or 3 axles have this play at the same time.

This is what's inside the axle of my S90. I took that apart to see if they are fixable/replaceable. Unfortunately, this exact tripod joint is not available with any supplier online. Volvo made it this way so they force you to buy the replacement axles from them that are priced at $600 each!!! Crazy!


Volvo axles made in Poland shouldn't have this same issue. It seems only car made in China have the Chinese made low quality axles. They either are defective or they don't last long for some reason.






Sent from my YAL-L21 using Tapatalk


Sent from my YAL-L21 using Tapatalk
 
#34 ·
(Solved) Volvo S90 XC90 XC60 T6/T5 Vibration Issue SPA 2018 (AWD)

Hello everyone,

I had a noticeable vibration on my 2018 S90 T6 Inscription. The car was shuttering and vibrating heavily under acceleration or coasting at different speed (at 30K miles).

After inspecting and balancing the tires and wheels twice, as advised by the dealer, as usual:mad:. It turned out the axle shaft in the front right was the cause of the vibration. Easy to inspect by any qualified technician. The right side was moving while the other side wasn't. Check the below video and you will see the play in the axle.

The car was making the vibration since 24k miles and it was intermittent. I found the source of the vibration at around 30K miles, after it got worse & became permanent.

Update 1 ::mad::mad::mad:

The dealer diagnosed the car and found two issues:
1- The right drive axle had a play and needed to be replaced as expected

2- Front Prob drive shaft CV Joint is defective: The dealer showed me the new redesigned version where it is marked with a green line. If you don't see the green line on your prob shaft, this means you might have the old design one and will probably be defective.

Item#2 in the picture CV JOINT
propeller shaft.
Only for front CV joints. For rear CV joints the entire propeller shaft must be replaced. front.



Update 2 :whistle::whistle:👍👍👍

Guys,

If you are facing this weird vibration, it's coming from the drive shaft (Propeller shaft front head) on AWD system. Check the last page in this technical journal. https://static.nhtsa.gov/odi/tsbs/2019/MC-10158649-9999.pdf

If your car doesn't have the green mark on the propeller shaft, it has to be replaced right away as it's most likely defective. The dealer replaced this part under warranty and the vibration in the cabin and drivetrain went away. However, I still have other vibration issues from two bent wheels and tire bubbles (20'' wheels sucks :mad:👎). Car mileage around 32K miles.

There is a rebuild kit #31492442 if your car out of warranty

2018 Volvo S90 Cv Joints the entire Propeller Shaft must be replaced. Only Cv Joints - 31492442 - Genuine Volvo Part
I put my car on a lift today and unfortunately it was so rusted I was unable to see any markings. My center supports were in great shape, as well as the mounts. Thanks for the info!
 
#35 ·
Not sure if this would apply here, but my wife’s 2018 XC90 Momentum was experiencing a weird random heavy vibration at highway speeds. We would be driving for a while and then all of a sudden we would here a humming that would get progressively worse accompanied with complete vehicle shaking, to the point where the whole vehicle is shaking excessively, you then depress the brake pedal to slow down and the steering wheel and brake pedal would almost shake out of your hand and foot. We would pull off the nearest exit and bring the vehicle to a complete stop, inspect the wheels to make sure nothing was loose, get back on the highway and it’s like the vibration was never there. Vehicle has been at the dealer since September, and just received notice that the cause of the “Ghost Virbration,” is actually the brake booster. Something with the active brake control has failed and causes excessive heat and vibration felt throughout the vehicle. Something triggers the system to activate , causing the caliper to clamp down on the brakes in an effort to slow the wheel and or vehicle down, essentially super heating the brakes. Figured I would post here in case someone has experienced the same issue as we have. Volvo calls it “Ghost Vibration”
 
#36 ·
Not sure if this would apply here, but my wife’s 2018 XC90 Momentum was experiencing a weird random heavy vibration at highway speeds. We would be driving for a while and then all of a sudden we would here a humming that would get progressively worse accompanied with complete vehicle shaking, to the point where the whole vehicle is shaking excessively, you then depress the brake pedal to slow down and the steering wheel and brake pedal would almost shake out of your hand and foot. We would pull off the nearest exit and bring the vehicle to a complete stop, inspect the wheels to make sure nothing was loose, get back on the highway and it’s like the vibration was never there. Vehicle has been at the dealer since September, and just received notice that the cause of the “Ghost Virbration,” is actually the brake booster. Something with the active brake control has failed and causes excessive heat and vibration felt throughout the vehicle. Something triggers the system to activate , causing the caliper to clamp down on the brakes in an effort to slow the wheel and or vehicle down, essentially super heating the brakes. Figured I would post here in case someone has experienced the same issue as we have. Volvo calls it “Ghost Vibration”
 
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